shopping_list = []

shopping_list.append("键盘")
shopping_list.append("键帽")

print(shopping_list)

shopping_list.remove("键帽")
print(shopping_list)



shopping_list.append("鼠标")
shopping_list.append("显示器")

print(len(shopping_list))
print(shopping_list)
print(shopping_list[1])
